Just hosting it here for the Tutorial section.
Oh ya: Thanks to
Jeep Rubicon for this.
Step 1: I basiclly just drew the outline/template. It was kinda scratchy at first but then I made crisp lines. In my opinion if your template/outline is good chances are the car will be good.
Step 2: I just drew the wheels in (The hardest part I think). Make sure your elipses are correct before you draw your rims/hubs in.
Step 3: I drew in all the details such as lights, door lines, air vents etc. You don't have to add much detail at this stage just an outline.
Step 4: I just drew the interior in, u can barely see it. Try to make your interior match the proportions of the car, mines aren't perfect.
Step 5 :I started the shading and defined the lines. I made my lines too dark, dont make them dark this was my mistake, if they are dark it makes the car look more cartoony than realistic.
Step 6: I did the rest of the shading, just need to smooth it out and i might make it a bit darker. After this step it's completed unless you want to smooth out the shading.